Public Review of ACN and RDM Changes
ESTA, the group behind such standards as DMX, RDM, and ACN, frequently publishes drafts of proposed changes to these standards. Right now there are two sets of documents up for comment: one involving additions to RDM and the other a set of updates to ACN. See the Public Review Documents section of the ESTA website for free access to the drafts.
These drafts are only posted for a limited time, so check regularly if you're interested such things.
(yet another Don) in pursuit of the perfect blinky.